I got this to supplement a similar one I inherited from my father-in-law. It does not perform as well as the more vintage one I already had. The slider tends to jam and, somehow, it's able to jump the mechanism causing the jaws to be out of sync - slider all the way back...jaw NOT all the way OPEN. Jaws closed...slider not all the way up. I opened it and reset the syncing but it skipped again and again! Now, I don't use it. Makes a great paperweight though! Disappointed.